Pitman connection.



No. 720,663. l PATNNTEN 11513.17, 190s..

- N. w. BUNGEss. PITMAN- CONNECTION.

APPLIoATIoN FILED JUNE 9. 1962. No MODEL. X 2 SHEETS-,SHEET 1.l

l PATENTBD FEB. 1'7,l 1903.

E. W. BURGESS. PITMAN CONNEGTION. f APPLIoATIoN FILEDJUNI: 9, 1902.

l 2 SHEETS-SHEET 2.

No MODEL.

Inl/enter mi N'onms virtus ca.. Fna-ranma. wAsmNmoN, r.-A c.A

UNITED vSTATES PAT-ENT 'y OEEICE.

EDWARD W. BURGESS, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO INTER- NATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

PITMANoNNEo-rloN.

sPncInIcArroN forming partof Letters' rareza No. 720,663, dated February17, 1903. Appnati'tn inea rune 9,1902l semina 110,769. montati.)

To all whom it may concern:

Be it known that I, EDWARD W. BUEGEss, a citizen of the United States,residing atQMilwaukee, in the county of Milwaukee andState of Wisconsin,have invented certain new and useful Improvements in Pitmen Connections,

of which the following is a specification, reference being had to theaccompanying draw-1 ings, forming a part thereof.

My invention relates to improvements inv of the pitman that Iconnectswith the knife.

Fig. 4 is a section on line C -D of Fig. 3. Fig. 5 is a rear view ofFig. 3. Fig. 6 is a section on line E F of Fig. 3. Fig. 7 isa plan viewof the movable yhalf-box, and Fig. 8 is an elevation of Fig. 7. Fig.v9is a' plan view of the clamping-Washer. Fig. 10 is a section on line GI-I of Fig. 5, and Fig. 11 is an elevation of Fig. 9.

1 is the crank-wheel; 2, the knife; '3, the

pitman; 4, the crank-pin; 5, the crank-box;

6, the ball on the knife-heel. The pitman is forked at the crank-Wheelend and has oppositely-disposed cone-shaped bearings 7 and 8, that areseated in like-shaped cavities formed in the ear 9 of crank-box 5. Theopposite end of the pitman has a half-box 10 integral therewith toreceive a part ofthe ball 6. 11 is the other half-box, having theslotted tailpiece 12.

13 is a bossprojecting outward from the wall 14 of the pitman 3.

15 is a Washer the periphery of which is an involute curve. A cylinder16 forms a portion of the back of the washer and passes through theslotted tailpiece 12 in the halfbox 11 and surrounds the boss 13. Thelength of the cylinder is less than the thickness of the tailpiece andgreater than the length of the boss 13. On its face the washer isprovided with an angular boss 17, which is countersunk to receive thehead of a plowbolt 18, the bolt passing through the washer and the wall14 and receiving the nut outside ofthe wall. The washer 15 has a gap 19in 55 its periphery, as showirin Fig. 1. The purpose of the gap is toallow the half-box 11 to be moved far enough back when the washer Vis inposition to bring the gap opposite the half-box to admit the ball on theknife-heel 6o between the two half-boxes.

' The operation of the device is as follows: The forked end of thepitman is spread apart, and the cone-shaped bosses are seated in thebearings on the crank-box and `a throughbolt holds them in adjustment,thebolt being "strained sufficient to hold them from rattling and stillallow a movement on the pivot-bolt to prevent a cramping of the box onthe crankpin. The half-box 11 is moved back into the 7o gap in thewasher, and the pitman is moved into place with the`ball on theknife-heel between the two half-boxes; The washer 15 is then turned, andits periphery gradually receding f rom the oenter and acting against the7 5 back of the half-boxll forces it against the ball, which is thusheld between the two halfboxes. The bolt 18 being drawn tight clamps thetailpiece 12 against the wal114 and holds the half-box 11 againstmovement. The half- 8o boxes grasping the ball on the knife-heel arefree to swing around its center-to a limited extent in anydirection, andthus all liability of a cramping at this point is removed and any wearof the parts may be compensated for by adjusting the movable half-box11.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a pitman connection that has one part of a journal-box adjust-able relative to the 9o other, the combination of the pitman and thexed part, a movable part provided with a longitudinal slot, a cam-washerhaving a cylindrical portion, that passes through the slot in the washerand is pivoted on the pitman, a bolt passing through saidhub and pitmanto clamp the washer against the movable part of the half-box.

2. The combination to form a pitman connection, of a Wrist-pin, apitman, a half-boxin- 1c o tegral therewith, a half-box adjustablethereon, said adjustable part provided with a slotted extension, awasher having a cam-shaped periphery acting against the movablehalfbox,and a cylindrical part that passes through the slotted extensionand is pivoted on the pitman, and means for clamping the Washer to thepitman and against the half-box.

3. The combination to form a pitman connection, ofa wrist-pin, apitman,a half-box integral therewith, a half-box adjustable thereon, said adjustable part provided with a slotted extension, a washer havingacam-shaped periphery, acting against the movable halfboX,and acylindrical part that passes through the slotted extension of themovable half-box and is pivoted to the pitman, means for turning theWasher on its pivot, and a bolt that clamps it against the movablehalf-box.

4. The combination to form a pitman connection ofa Wrist-pin, apitman,ahalf-box integral therewith, a half-box adjustable thereon, saidadjustable part provided with a slotted extension, a washerhaving acam-shaped periphery acting against the movable halfboX, acylindricalpart that passes through the slotted extension of the movable half-boxand is pivoted to the pitman, an angular boss on the face of the washer,by which it may be turned, and a bolt that holds the Washer and movablehalf-box to the pitman.

5. The combination to form a pitman connection, of a Wrist-pin, apitman, a half-box, non-adjustable thereon, a half-boX adjustablethereon, said adjustable part provided with a slotted extension, awasher having a camshaped periphery acting against the movablehalf-box,a cylindrical part that passes through the slotted extension ofthe movable half-box and is pivoted to the pitman, means for turning thewasher on its pivot and means for clamping it against the movablehalf-box.

6. The combination to form a journal-box for a pitman connection, of astationary halt'- box, a movable half-box adjustable toward thestationary half-box, an adjusting-Washer having a cam-shaped peripheryacting against the movable halfbox, said washer being pivoted on thepitman, and means for clamping the washer against the half-box and tothe pitman.

7. Ina pitman connection, the combination of the crank-wheel andwrist-pin, a reciprocating part having a journal attached thereto, apitman having a fixed half-box connected therewith, a half-box movableon the pitman, and adapted in connection with the fixed half-box to forma journal-box, said half-box provided with a slotted extension, a washerthat has a cam shaped periphery acting against the movable half-box andextending across the slotted extension, a boss on the pitman,cylindrical projection on the back of the washer, that pivots on thesaid boss, a bolt that passes through the washer, and the boss on thepitman and means for turning the Washer on its pivot.

8. In a pitman and pitman connection, the combination of a crank-Wheeland crank-pin, a journal-box for the crank-pin, said journalboX having aprojection on one side that has cavities on opposite sides thereofadapted to receive cone-shaped bosses, forming a part of the forked endof the pitman, anda bolt that secures the forked end to the saidprojection, the said pitman provided at its opposite end with a half-boxintegral therewith, and an adjustable half-box with means for securingthe adjustable half-box to the pitman.

In Witness whereof I hereto affix my signature in presence of twowitnesses.

EDWARD W. BURGESS.

Witnesses:

FRANK. J DRYBURGH, EARLE J. BRYDEN.

